Yes I use the flora series 3 part nutrients and have for many, many years.

I have tried Advanced nutrients sensi pro series, it was very good. just not as good as they said. It takes away all of the control I like to have. I have heard great things about Dutch Masters new stuff but I have not tried it yet.

epsom salt is used in small amounts every other res change just to be safe.

Advanced Nutrients HyOx is not bad it process a little better and mixes a little better then just a tsp of epsom salt for 5 gallons.
Zandor Reviewed by Zandor on . Hey Zandor....about epsom salts (magnesium) Would tou recomend I add a little epsom salt to my rez? A lot of people use it and some say that GH series lacks it a bit. I assume your Calmag you use is like epsom salt with calcium too. You use GH right? Flora series?. Maybe I should try that too. Rating: 5